CN100433701C - Transmitting method for multimedia broadcasting/group broadcasting information - Google Patents

Abstract

The present invention discloses a method for transmitting multimedia broadcasting/multicasting service (MBMS) information, which is characterized in that the method comprises the following procedures: a. after receiving data transmitted by a high layer, an RLC UM entity of a transmitting party packs a received SDU into a PDU; b. the RLC UM entity of the transmitting party transmits the packed PDU to a low layer and stores the transmitted PDU. The method can simplify the processing complexity of the current RLC UM entity, and thereby, the reliability of MBMS information transmission is improved.

Description

Multimedia broadcast/group broadcast service transmission of Information method

Technical field

The present invention relates to the information transmission technology, relate in particular to MBMS transmission of Information method in the multimedia broadcast/group broadcast service (MBMS).

Background technology

Development along with the 3G (Third Generation) Moblie technology, people no longer are satisfied with speech business to the demand of mobile communication, because 3G (Third Generation) Moblie can provide than the more service of high data rate of second generation mobile communication, so a large amount of multimedia services emerge, such as: services such as Internet network are downloaded, browsed at a high speed to visual telephone, picture.Wherein, some applied business require a plurality of users can receive identical data simultaneously, such as: video request program, television broadcasting, video conference, online education, interactive game or the like.

In order effectively to utilize the mobile radio communication resource, 3G (Third Generation) Moblie has been introduced the notion of multicast and broadcasting, and multicast and broadcasting are a kind of technology that transmits data from a data source to a plurality of targets.Be exactly specifically, the WCDMA/GSM global standardsization organize 3GPP to propose multimedia broadcast/group broadcast service (MBMS, Multimedia Broadcast/Multicast Service), so-called MBMS provides a data source to send the point-to-multipoint service of data to a plurality of users in mobile communications network, the realization Internet resources are shared, improve utilization rate of network resource, the interface resource of especially eating dishes without rice or wine.The MBMS of 3GPP definition can not only realize the classes of messages multicast and the broadcasting of plain text low rate, and can also realize the multicast and the broadcasting of high-speed multimedia business.

Fig. 1 is for supporting the wireless network architecture schematic diagram of broadcasting/packet service, as shown in Figure 1, among the existing 3GPP, support that the wireless network architecture of broadcasting/packet service is a broadcasting/packet service server (BM-SC) 101, BM-SC 101 is by Gmb interface or Gi interface and TPF critical point GPRS Support Node (GGSN, Gateway GPRS Support Node) 102 link to each other, and a BM-SC 101 can link to each other with a plurality of TPF GGSN102; TPF GGSN 102 links to each other by Gn/Gp interface and Serving GPRS Support Node (SGSN, ServingGPRS Support Node) 103, and a GGSN 102 can link to each other with a plurality of SGSN 103; SGSN103 can link to each other with universal mobile telecommunications system (UMTS) land radio access web (UTRAN) 104 by the Iu interface, UTRAN 104 links to each other with user terminal (UE) 106 by the Uu interface then, SGSN 103 also can strengthen wireless access network (GERAN) 105 by Iu/Gb interface and global system for mobile communications (GSM) and link to each other, and GERAN 105 links to each other with UE 107 by Um Interface then.Wherein, GGSN and SGSN belong to the node in the core net in the wireless network (CN).

The network configuration that provides from Fig. 1 as can be seen, in order to support the MBMS business, in 3-G (Generation Three mobile communication system), increased mobile network functional entity--broadcast multicast service center, be BM-SC, described BM-SC is content provider's a inlet, be used for authorizing and initiating the MBMS bearer service, and plan transmits the MBMS content to schedule at mobile network.In addition, on functional entitys such as UE, UTRAN, GERAN, SGSN, GGSN, increased the function relevant with MBMS.

MBMS comprises multicast pattern and broadcast mode, and wherein multicast pattern needs user's corresponding multicast group of contracting, and carries out activation of service, and produces corresponding charge information.Because it is different that multicast pattern and broadcast mode exist on business demand, cause also difference of operation flow separately, as shown in Figures 2 and 3, Fig. 2 is the operation flow schematic diagram of MBMS multicast pattern, Fig. 3 is the operation flow schematic diagram of MBMS broadcast mode.

As shown in Figure 2, the processing procedure that relates to of MBMS multicast service comprises: signatory (Subscription), service declaration (Service announcement), user add that (Joining), session begin (Session Start), MBMS notice (MBMS notification), data transmit (Data transfer), conversation end (SessionStop) and user and withdraw from (Leaving).Wherein, signatory process is used for allowing the user subscribe to required MBMS service in advance; Service declaration process is used for by the current service that can provide of BM-SC declaration; User's adition process is a MBMS activating multicast service process, UE is in adition process, informing network self is ready to become the member of current multicast group, receives corresponding professional multicast packet, and this adition process can be created the MBMS UE context of record UE information in the UE of network and adding multicast group; Session begins in the process, and BM-SC is ready to transfer of data, and informing network is set up the bearing resource of corresponding core net and Access Network; The MBMS notification procedure is used to notify UE MBMS multicast conversation to be about to begin; In data transfer procedure, BM-SC transfers data to UE by the bearing resource that session begins to set up in the process, the MBMS business has two kinds of patterns when transmitting between UTRAN and UE: point-to-multipoint (PTM) pattern and point-to-point (PTP) pattern, the PTM pattern sends identical data by the MTCH logic channel, all add multicast service or can receive the interested UE of broadcasting service, ptp mode sends data by the DTCH logic channel, has only a corresponding UE to receive; The conversation end process is used for the bearing resource that the session process that begins is set up is discharged; The user withdraws from process makes the subscriber in the group leave multicast group, i.e. user's receiving multicast data no longer, and this process can be with corresponding MBMS UE context deletion.

As shown in Figure 3, processing procedure that the MBMS broadcasting service relates to and MBMS multicast service are similar, just before session begins, do not need to carry out signatory process and user's adition process, and, after conversation end, do not need to carry out the user and withdraw from process.

At the data transfer phase of multicast pattern business and broadcast mode business, the MBMS business is transmitted information between UTRAN and UE mode has two kinds of patterns: put multiple spot (PTM) pattern and point-to-point (PTP) pattern.Wherein, the PTM pattern sends identical data by MBMS point-to-multipoint service channel (MTCH), and all add multicast service or can receive the interested UE of broadcasting service; Ptp mode sends data by Dedicated Traffic Channel (DTCH), has only a corresponding UE to receive.

In MBMS PTM transmission mode, relevant controlled in wireless information comprises business information, access information, radio bearer information, frequency layer convergence (FLC) information etc., is all sent to multiple spot control channel (MCCH) by logic channel such as MBMS point by Radio Resource control (RRC) layer.MCCH information is based on the fixed schedule mode and transmits, and in order to improve reliability, UTRAN can repeat MCCH information.Fig. 4 is MCCH transmission of Information scheduling schematic diagram, and as shown in Figure 4, all squares are MCCH information among the figure, and the cycle that repeats to send MCCH information is the repetition period, and complete MCCH information can periodically be sent in the repetition period; The modification cycle is defined as the repetition period of integral multiple, all will make amendment to MCCH information in each modification cycle; The access information of MBMS can periodically be sent in the access information cycle, and the access information cycle is that the integer of repetition period is cut apart.

MCCH information is divided into criteria information (Critical Info) and non-criteria information again, wherein, criteria information is made up of MBMS information of adjacent cells, MBMS business information, MBMS radio bearer information, and be the information that needs the periodicity emphasis recurrence to send, the content that is sent in each repetition period is constant, can only in the modification cycle, when sending for the first time, MCCH information just can be modified; Non-criteria information is meant the MBMS access information, and the information for not needing the periodicity emphasis recurrence to send, and can revise at any time.The square that black is filled among Fig. 4 is non-criteria information, and unfilled square is a criteria information, and the square of filling with positive backslash is non-criteria information and the criteria information that content changes respectively.

The protocol stack structure of MCCH as shown in Figure 5, the protocol element of MCCH from top to bottom is followed successively by: rrc layer, wireless chain control layer (RLC), media access control layer (MAC), physical layer (PHY).Wherein, the mapping relations of MAC layer logical channel and physical layer FACH passage as shown in Figure 6, in existing systems, MCCH information is that the control information of MBMS all is mapped to forward access channel (FACH) and go up sends.Rlc layer uses Unacknowledged Mode (UM) to transmit MCCH information, in the prior art, the data transfer procedure of UM pattern as shown in Figure 7, the transmission method of MBMS control information mainly comprises the process of transmitting of transmit leg (Sender) wireless chain control layer Unacknowledged Mode (RLC UM) entity, and the receiving course of recipient (Receiver) RLC UM entity.Can send one or several PDU in each Transmission Time Interval, MAC determines size and the number of PDU in each Transmission Time Interval.

At present, the process of transmitting of unacknowledged mode data protocol Data Unit (UMD PDU) is: after transmit leg RLC UM entity received high-rise unacknowledged mode data transmission request, the RLC Service Data Unit (SDU) that the transmit leg scheduling receives from high level sent; Send if there are one or more RLC SDU to be scheduled, then RLC UM entity notifies low layer to receive the data that comprise SDU number and size from high level earlier; RLC UM entity to the SDU segmentation, if possible also carries out cascade according to the PDU size of low layer indication then; Afterwards, it is VT (US) that the sequence number territory is set, for each SDU that finishes in UMD PDU is provided with the Length Indication territory; At last, submitting the UMD PDU of the number of asking to is the MAC layer to low layer, and for each UMD PDU that is submitted to low layer upgrades VT (US), simultaneously, buffering is not submitted to the SDU of low layer.

The receiving course of UMD PDU is: after recipient RLC UM entity was received one group of UMD PDU from low layer, this RLC UM entity upgraded VR (US) according to the UMD PDU that receives; If the renewal step-length of VR (US) is not equal to 1, then be discarded in the SDU that segmentation is arranged among the UMD PDU that loses, otherwise the UMD PDU that reorganization receives is RLC SDU, and the RLC SDU after the submission reorganization is a rrc layer to high level.

In the prior art, RLC has been increased the out of order transfer function of SDU, so-called out of order transfer function is meant the PDU to having sent, can retransmit according to the PDU of indication with any one appointment.For realizing out of order transfer function, to increase the sign of MCCH logical channel type at the MAC head.But in actual treatment, have only criteria information can use out of order transfer function, because criteria information can send identical content in each repetition period, in the previous repetition period error of transmission or the information of losing can by the back in the repetition period information transmitted recover, but not criteria information can't be used out of order transfer function.But at present, criteria information and non-criteria information transmit by a MCCH logic channel, use same RLC UM entity, this just requires sending entity can distinguish the PDU that comprises criteria information and non-criteria information, that is to say, can not be cascaded among the same RLC PDU for SDU that comprises criteria information and the SDU that comprises non-criteria information.

Specifically, in the prior art in order to realize out of order transmitting function, the requirement transmit leg satisfies: 1. the RRC SDU that will be provided to the RLC indication is that criteria information also is non-criteria information, and RLC can not be cascaded to the SDU of criteria information and the SDU of non-criteria information among the RLC PDU.2. the PDU that comprises criteria information sends the back and is stored by RLC, and the sequence number of stored PDU can not be by usefulness again, and RRC can all stored PDUs of request retransmission.3. RRC begins to rebuild RLC UM entity in each modification cycle.Simultaneously, require the recipient to satisfy: 1. RLC receives that whenever a PDU need attempt the relevant SDUs that recombinates out, if the PDU of this sequence number was stored, then abandons this PDU.2. RRC begins to rebuild RLC UM entity in each modification cycle.

Based on above-mentioned requirements, after realizing out of order transfer function, the process of transmitting of UMD PDU is identical with cardinal principle before the out of order transfer function of realization, the main distinction is: to each SDU, high-rise will the setting the SDU that supports out of order function stored indication, transmit leg has the storage indication and can not be cascaded among the same PDU with the SDU that stores indication when handling; And when transmit leg RLC UM entity submits to the UMDPDU of the number of asking to give low layer, need to increase and judge, judge in the PDU of pre-treatment, whether to comprise the storage indication,, then store current PDU if comprise, otherwise, undertaken by the normal process flow process.

Accordingly, the receiving course of UMD PDU becomes: after recipient RLC UM entity is received one group of UMD PDU from low layer, the recipient presses each PDU of sequence number sequential processes, if the PDU identical with the PDU sequence number that receives is stored, then abandons this PDU that receives; Otherwise, pressing this PDU of sequence number sequential storage, the UMD PDU that the winding of laying equal stress on is received is RLC SDU; Then, it is high-rise to submit to RLC SDU to give.

From above-mentioned handling process as can be seen, because transmit leg need determine whether to be provided with the storage indication to each PDU in the prior art scheme, and before transmission, also need to distinguish PDU that has the storage indication and the PDU that does not indicate with storage, whether need storage with decision, and require the SDU that has the SDU of storage indication and do not have the storage indication can not be cascaded among the same PDU; Accordingly, the recipient also needs so, to make the processing of RLC UM entity become very complicated to realizing that out of order prefunctional flow process changes; And, if the unreasonable transmission that will postpone MBMS information of RLC dispatching algorithm.

Summary of the invention

In view of this, one object of the present invention is to provide a kind of sending method of multimedia broadcast/group broadcast service information, can simplify the processing complexity of present transmit leg RLC UM entity, and then raising MBMS information is in the reliability of transmit leg transmission, another object of the present invention is to provide a kind of method of reseptance of multimedia broadcast/group broadcast service information, can simplify the processing complexity of present recipient RLC UM entity.

For achieving the above object, technical scheme of the present invention is achieved in that

A kind of sending method of multimedia broadcast/group broadcast service information, this method may further comprise the steps:

At transmit leg two RLC UM entities are set, one of them is for handling the RLC UM entity of criteria information, and another is for handling the RLC UM entity of non-criteria information;

The RLC UM entity that transmit leg is handled criteria information is assembled into PDU with the SDU that carries criteria information that is received after receiving the Service Data Unit SDU that carries criteria information that high level sends;

The PDU that is assembled is sent to low layer, and stores the PDU that is sent,

Wherein, the information of described criteria information for needing the periodicity emphasis recurrence to send, the information of described non-criteria information for not needing the periodicity emphasis recurrence to send.

After the PDU that storage is sent, this method further comprises:

Judge whether to satisfy retransmission condition, if then the PDU of dispatching office storage retransmits; Otherwise the PDU that sends new assembling maybe needs the PDU that retransmits.

It is wherein, described that to satisfy retransmission condition be that high level is provided with and retransmits indication; Then describedly judge whether to satisfy retransmission condition and be: judging whether high level is provided with retransmits indication, if the PDU that the RLC UM entity of then handling criteria information is dispatched all storages retransmits; Otherwise the PDU that sends new assembling maybe needs the PDU that retransmits.

Perhaps, this method further comprises: set in advance one and retransmit timing device, then described satisfy retransmission condition be timing device then.Wherein, described timing device is the timer of rrc layer, this timer was activated or restarts in the zero hour of repetition period, quit work the finish time in the repetition period, when timer quits work, the PDU that the RLC UM entity of RRC notifier processes criteria information, indication are handled the RLC UM entity dispatching office storage of criteria information retransmits; Or described timing device is the timer of rlc layer, RRC starts this timer at a RLCUM entity of revising first indication processing zero hour repetition period criteria information in cycle, restarted when timer quits work, the PDU that the RLC UM entity of handling criteria information simultaneously begins the dispatching office storage retransmits.

In the such scheme, describedly the SDU that receives is assembled into PDU specifically comprises: the SDU that is received is carried out segmentation and cascade, be assembled into PDU, and sequence number territory and Length Indication territory are set for the PDU that is assembled into; Wherein, described cascade operation satisfies: certain first segmentation cascade with next SDU of last segmentation of a SDU.

In the such scheme, this method further comprises: before one was revised the zero hour in cycle, the RLC UM entity of transmit leg processing criteria information abandoned the PDU of all storages and initialization sequence state variable.

A kind of method of reseptance of multimedia broadcast/group broadcast service information, this method comprises: the recipient two RLC UM entities are set, one of them is for handling the RLC UM entity of criteria information, and another is for handling the RLC UM entity of non-criteria information; After the RLC UM that the recipient handles criteria information received one group of PDU, each PDU of sequential processes judged whether and is stored as the identical PDU of pre-treatment sequence number, if having, then abandons this PDU; Otherwise, storing this PDU, the PDU that the winding of laying equal stress on is received is SDU, the SDU with reorganization submits to high level then,

Wherein, the information of described criteria information for needing the periodicity emphasis recurrence to send, the information of described non-criteria information for not needing the periodicity emphasis recurrence to send.

Multimedia broadcast/group broadcast service transmission of Information method provided by the present invention, utilize the criteria information in the interior MCCH information of a modification cycle to send these characteristics of identical content in the repetition period, with criteria information and non-criteria information separate processes, so, just can only change criterion information processing flow process, and the out of order prefunctional handling process of existing techniques in realizing is adopted in the processing of non-criteria information fully, and, in criterion information processing flow process, owing to need not distinguish criteria information and non-criteria information again, so need not to be provided with again storage indication, also need not to distinguish again as the PDU of pre-treatment whether need storage, each PDU is stored.Therefore, the present invention has simplified the function and the implementation complexity of RLC UM entity; Though the RLC UM entity of handling criteria information is needed to increase out of order transfer function, to compare with the prior art scheme, the modification that agreement is made is still less handled simpler; And, improved the MBMS reliability of information transmission to a certain extent.

In addition, the present invention can also be applied to some other data that need RLC UM entity to retransmit, such as: the schedule information on MBMS point-to-multipoint time channel (MSCH) logic channel, therefore, the scope of application of the present invention is wider.

Description of drawings

Fig. 1 is for supporting the wireless network architecture schematic diagram of broadcasting/packet service;

Fig. 2 is the operation flow schematic diagram of MBMS multicast pattern;

Fig. 3 is the operation flow schematic diagram of MBMS broadcast mode;

Fig. 4 is MCCH transmission of Information scheduling schematic diagram;

Fig. 5 is the protocol stack structure figure of MCCH;

Fig. 6 is the mapping relations figure of the FACH passage of the logical channel of MAC layer and physical layer;

Fig. 7 is the transmission means figure of MBMS control information;

Fig. 8 is the process chart of transmit leg in the transmission method of the present invention;

Fig. 9 is the process chart of recipient in the transmission method of the present invention.

Embodiment

Core concept of the present invention is: all data that need RLC UM to retransmit are preserved when sending.Here, the data of described re-transmission can be the criteria information in the MCCH information, also can be the schedule informations of MSCH logic channel.Below only with the example that is treated to criteria information in the MCCH information.

For MCCH information, thought of the present invention is: with criteria information and non-criteria information separate processes, all set up two the identical RLC UM of function entities at transmit leg and recipient, be respectively applied for and handle criteria information and non-criteria information, like this, processing and prior art for the PDU that carries non-criteria information are identical, and all carry out unified stores processor for each PDU that carries criteria information, need not to be provided with again storage indication, also need not to distinguish again as the PDU of pre-treatment whether need storage.

Because MCCH information is divided into criteria information and non-criteria information, wherein, criteria information can only be revised first repetition period of revising the cycle; But not criteria information then can be revised at any time.And criteria information can send identical content in each repetition period, in the previous repetition period error of transmission or the information of losing can by the back in the repetition period information transmitted recover.The present invention wants to utilize These characteristics just, considers criteria information and non-criteria information separate processes.Therefore, the prerequisite of the present invention's realization is: respectively set up two RLC UM entities at transmit leg and recipient.Specific practice is:

The criteria information of MCCH information is handled by two different RLC UM entities with non-criteria information, and transferred to the MAC layer, by the MAC layer two logic channels are multiplexed on the FACH again by two logic channels.Wherein, identical for the function of RLC UM in the function of the RLC UM entity of handling non-criteria information and the prior art, specifically processing procedure is as described in the UMD PDU process of transmitting in the background technology.Need increase out of order transfer function for the RLC UM entity of handling criteria information, promptly need to store the PDU that may retransmit, but compare with the technical scheme of the out of order transfer function of support that is proposed in the prior art, the modification that implementation of the present invention is made agreement still less, handling can be simpler.

Further describe among the present invention when realizing out of order transfer function the concrete processing procedure of transmit leg RLCUM entity and recipient RLC UM entity below in conjunction with accompanying drawing.Though transmit leg and recipient respectively have two RLC UM entities, but because it is same as the prior art to handle the function and the processing procedure of the RLC UM entity that comprises non-criteria information PDU, therefore, the RLC UM entity of hereinafter being mentioned only refers to handle the RLC UM entity that comprises criteria information PDU.

Among the present invention, require for transmit leg RLC UM entity: the PDU of all transmissions will be stored, and RRC can all stored PDUs of request retransmission; And RRC will rebuild RLC UM entity when each modification cycle begins.Require for recipient RLC UM entity: RLC receives that whenever a PDU will attempt the relevant SDUs that recombinates out, if the PDU of this sequence number is stored, then abandons this PDU; And RRC will rebuild the RLC entity when each modification cycle begins.

Based on above-mentioned requirements and prerequisite, after transmit leg RLC UM entity receives high-rise unacknowledged mode data transmission request, scheduling sends from the RLC SDU that high level receives, if having one or more RLCSDU to be scheduled sends, then the processing procedure of transmit leg RLC UM entity may further comprise the steps as shown in Figure 8 among the present invention:

Step 801: after transmit leg RLC UM entity was received high-rise unacknowledged mode data transmission request, the notice low layer had received data from high level, comprises SDU number and size in these data.Here, low layer refers to the MAC layer, and high level refers to rrc layer.

Step 802:RLC UM entity, then also will carry out cascade and handle if can carry out cascade according to the SDU segmentation of PDU size to being received of low layer indication, is assembled into PDU.

Wherein, for cascade operation, for the data field that fills up PDU fully with avoid unnecessary filling, last segmentation of a SDU must with first segmentation cascade of next SDU.

Step 803:RLC UM entity be the PDU that is assembled into the sequence number territory is set is VT (US), and the Length Indication territory is set for each SDU that in UMD PDU, finishes.

Wherein, the Length Indication territory of PDU is used to refer to the end position of SDU at a PDU; The sequence number territory value of PDU is the value of serial-number-state variable, and this state variable initial value is 0, and PDU of every transmission increases progressively with 1 and to 2 ^NDelivery, wherein N is the bit length in sequence number territory.

Step 804:RLC UM entity submits to the UMD PDU of the number of asking to give low layer, promptly sends the PDU that is assembled into by a MCCH logic channel to the MAC layer, and stores this PDU; RLC UM entity upgrades VT (US) for the UMD PDU that each is submitted to low layer simultaneously, and buffering is not submitted to the SDU of low layer.

In this step, RLC UM entity can also further judge whether to satisfy retransmission condition, if satisfy, then the PDU of dispatching office storage retransmits.Two kinds of implementations specifically can be arranged: a kind ofly be, judge whether high level is provided with to retransmit indication, if then the RLC UM entity PDU that dispatches all storages retransmits; Otherwise the PDU that sends new assembling maybe needs the PDU that retransmits.Another kind is, be provided with one and retransmit timing device, timing device then, RLC UM entity retransmits with regard to the PDU that dispatches all storages.

Wherein, described timing device is a timer of rrc layer, and this timer was activated or restarts in the zero hour of repetition period, quit work the finish time in the repetition period, when timer quit work, RRC notified RLC, and the PDU of indication RLC dispatching office storage retransmits.This timing device also can be a timer of rlc layer, RRC indicates RLC to start this timer first zero hour repetition period of revising the cycle, restarted when timer quits work, the PDU that while RLC begins the dispatching office storage retransmits.

Above-mentioned processing procedure is the processing procedure of transmit leg RLC UM in a modification cycle, and before the next one was revised the zero hour in cycle, transmit leg RLC UM entity abandoned the PDU of all storages, and the initialization sequence state variable.

Based on above-mentioned requirements and prerequisite, the processing procedure of recipient RLC UM entity may further comprise the steps as shown in Figure 9 among the present invention:

Step 901～904: after recipient RLC UM entity is received one group of UMD PDU from low layer, press each PDU of sequence number sequential processes, judge whether and be stored,, then abandon this PDU if there be the PDU identical to be stored with the PDU sequence number of receiving as the identical PDU of pre-treatment sequence number; Otherwise, pressing each PDU of sequence number sequential storage, the UMD PDU that the winding of laying equal stress on is received is RLC SDU, afterwards, the RLC SDU after the reorganization is submitted to high level.Here, low layer refers to the MAC layer, and high level refers to rrc layer.

The solution of out of order transmission proposed by the invention is not only applicable to the criteria information in the MCCH control information, can be suitable for for other data that need RLC to carry out retransmission process with same characteristic features, for example: the schedule information that transmits on the MSCH logic channel in the MBMS system, also can transmit by RLC UM entity, in order to improve the reliability of its transmission, also can use the method for out of order transmission proposed by the invention, when the schedule information of MSCH logic channel is handled, because all schedule informations on the MSCH logic channel all need to retransmit, so, need not to consider to set up the problem of two RLCUM entities transmit leg and recipient.

Such scheme is applicable to wireless communication systems such as GPRS, EDGE, WCDMA, TD-SCDMA, and the above only is preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.

Claims (9)

1, a kind of sending method of multimedia broadcast/group broadcast service information is characterized in that, this method may further comprise the steps:

At transmit leg two RLC UM entities are set, one of them is for handling the RLC UM entity of criteria information, and another is for handling the RLC UM entity of non-criteria information;

The RLC UM entity that transmit leg is handled criteria information is assembled into PDU with the SDU that carries criteria information that is received after receiving the Service Data Unit SDU that carries criteria information that high level sends;

The PDU that is assembled is sent to low layer, and stores the PDU that is sent,

Wherein, the information of described criteria information for needing the periodicity emphasis recurrence to send, the information of described non-criteria information for not needing the periodicity emphasis recurrence to send.

2, method according to claim 1 is characterized in that, after the PDU that storage is sent, this method further comprises:

Judge whether to satisfy retransmission condition, if then the PDU of dispatching office storage retransmits; Otherwise the PDU that sends new assembling maybe needs the PDU that retransmits.

3, method according to claim 2 is characterized in that, described to satisfy retransmission condition be that high level is provided with and retransmits indication;

Then describedly judge whether to satisfy retransmission condition and be: judging whether high level is provided with retransmits indication, if the PDU that the RLC UM entity of then handling criteria information is dispatched all storages retransmits; Otherwise the PDU that sends new assembling maybe needs the PDU that retransmits.

4, method according to claim 2 is characterized in that, this method further comprises: set in advance one and retransmit timing device, then described satisfy retransmission condition be timing device then.

5, method according to claim 4, it is characterized in that, described timing device is the timer of rrc layer, this timer was activated or restarts in the zero hour of repetition period, quit work the finish time in the repetition period, when timer quits work, the RLC UM entity of RRC notifier processes criteria information, the PDU that the RLC UM entity dispatching office storage of criteria information is handled in indication retransmits.

6, method according to claim 4, it is characterized in that, described timing device is the timer of rlc layer, RRC starts this timer at a RLC UM entity of revising first indication processing zero hour repetition period criteria information in cycle, restarted when timer quits work, the PDU that the RLC UM entity of handling criteria information simultaneously begins the dispatching office storage retransmits.

7, method according to claim 1 is characterized in that, describedly the SDU that receives is assembled into PDU specifically comprises: the SDU that is received is carried out segmentation and cascade, be assembled into PDU, and sequence number territory and Length Indication territory are set for the PDU that is assembled into; Wherein, described cascade operation satisfies: certain first segmentation cascade with next SDU of last segmentation of a SDU.

8, according to each described method of claim 1 to 7, it is characterized in that, this method further comprises: before one was revised the zero hour in cycle, the RLC UM entity of transmit leg processing criteria information abandoned the PDU of all storages and initialization sequence state variable.

9, a kind of method of reseptance of multimedia broadcast/group broadcast service information is characterized in that, this method comprises:

The recipient two RLC UM entities are set, one of them is for handling the RLC UM entity of criteria information, and another is for handling the RLC UM entity of non-criteria information;

After the RLC UM that the recipient handles criteria information received one group of PDU, each PDU of sequential processes judged whether and is stored as the identical PDU of pre-treatment sequence number, if having, then abandons this PDU; Otherwise, storing this PDU, the PDU that the winding of laying equal stress on is received is SDU, the SDU with reorganization submits to high level then,

Wherein, the information of described criteria information for needing the periodicity emphasis recurrence to send, the information of described non-criteria information for not needing the periodicity emphasis recurrence to send.

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